Flow controller valve



FIG. 1 is a perspective view taken from the top, front and left side of a flow controller valve showing my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view; and

FIG. 5 is a rear elevational view. 

The ornamental design for a flow controller valve, as shown. 